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Finding the Fourth Proportional to 984.36, 1,358.82 and 674.04

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Solution

The fourth proportional to 984.36, 1,358.82 and 674.04 is: 930.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.36 : 1,358.82 = 674.04 : x
  2. Step 2: Convert to fraction form
    984.36/1,358.82 = 674.04/x
  3. Step 3: Cross multiply
    984.36x = 1,358.82 × 674.04
  4. Step 4: Simplify right side
    984.36x = 915,899.03
  5. Step 5: Solve for x
    x = 915,899.03/984.36
  6. Step 6: Final answer
    x = 930.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.